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srsRAN_4G
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Starting to add reordering timers at PDCP NR entity. Timeout seems to be triggered correctly and pass the SDUs to the upper layers when it expires. First tests passing.

Browse Source
master
Pedro Alvarez 5 years ago committed by Andre Puschmann
parent b92c99ad2f
commit b7fdcaabc5
7 changed files with 183 additions and 76 deletions
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7
lib/include/srslte/upper/pdcp_entity_base.h
Unescape Escape View File

@ -98,7 +98,12 @@ protected:
bool do_integrity = false;
bool do_encryption = false;
pdcp_config_t cfg = {1, PDCP_RB_IS_DRB, SECURITY_DIRECTION_DOWNLINK, SECURITY_DIRECTION_UPLINK, PDCP_SN_LEN_12};
pdcp_config_t cfg = {1,
PDCP_RB_IS_DRB,
SECURITY_DIRECTION_DOWNLINK,
SECURITY_DIRECTION_UPLINK,
PDCP_SN_LEN_12,
pdcp_t_reordering_t::ms500};
std::mutex mutex;

26
lib/include/srslte/upper/pdcp_entity_nr.h
Unescape Escape View File

@ -85,7 +85,33 @@ private:
void write_data_header(const unique_byte_buffer_t& sdu, uint32_t sn);
void extract_mac(const unique_byte_buffer_t& sdu, uint8_t* mac);
void append_mac(const unique_byte_buffer_t& sdu, uint8_t* mac);
// Pass to Upper Layers Helper function
void deliver_all_consecutive_counts();
void pass_to_upper_layers(unique_byte_buffer_t pdu);
// Reordering callback (t-Reordering)
class reordering_callback : public timer_callback
{
public:
reordering_callback(pdcp_entity_nr* parent_) { parent = parent_; };
virtual void timer_expired(uint32_t timer_id) final;
private:
pdcp_entity_nr* parent;
};
reordering_callback reordering_fnc;
};
inline void pdcp_entity_nr::pass_to_upper_layers(unique_byte_buffer_t sdu)
{
if (is_srb()) {
rrc->write_pdu(lcid, std::move(sdu));
} else {
gw->write_pdu(lcid, std::move(sdu));
}
}
} // namespace srslte
#endif // SRSLTE_PDCP_ENTITY_NR_H

32
lib/include/srslte/upper/rlc_am.h
Unescape Escape View File

@ -290,24 +290,24 @@ private:
* Header pack/unpack helper functions
* Ref: 3GPP TS 36.322 v10.0.0 Section 6.2.1
***************************************************************************/
void rlc_am_read_data_pdu_header(byte_buffer_t *pdu, rlc_amd_pdu_header_t *header);
void rlc_am_read_data_pdu_header(uint8_t **payload, uint32_t *nof_bytes, rlc_amd_pdu_header_t *header);
void rlc_am_write_data_pdu_header(rlc_amd_pdu_header_t *header, byte_buffer_t *pdu);
void rlc_am_write_data_pdu_header(rlc_amd_pdu_header_t *header, uint8_t **payload);
void rlc_am_read_status_pdu(byte_buffer_t *pdu, rlc_status_pdu_t *status);
void rlc_am_read_status_pdu(uint8_t *payload, uint32_t nof_bytes, rlc_status_pdu_t *status);
void rlc_am_write_status_pdu(rlc_status_pdu_t *status, byte_buffer_t *pdu );
int rlc_am_write_status_pdu(rlc_status_pdu_t *status, uint8_t *payload);
uint32_t rlc_am_packed_length(rlc_amd_pdu_header_t *header);
uint32_t rlc_am_packed_length(rlc_status_pdu_t *status);
void rlc_am_read_data_pdu_header(byte_buffer_t* pdu, rlc_amd_pdu_header_t* header);
void rlc_am_read_data_pdu_header(uint8_t** payload, uint32_t* nof_bytes, rlc_amd_pdu_header_t* header);
void rlc_am_write_data_pdu_header(rlc_amd_pdu_header_t* header, byte_buffer_t* pdu);
void rlc_am_write_data_pdu_header(rlc_amd_pdu_header_t* header, uint8_t** payload);
void rlc_am_read_status_pdu(byte_buffer_t* pdu, rlc_status_pdu_t* status);
void rlc_am_read_status_pdu(uint8_t* payload, uint32_t nof_bytes, rlc_status_pdu_t* status);
void rlc_am_write_status_pdu(rlc_status_pdu_t* status, byte_buffer_t* pdu);
int rlc_am_write_status_pdu(rlc_status_pdu_t* status, uint8_t* payload);
uint32_t rlc_am_packed_length(rlc_amd_pdu_header_t* header);
uint32_t rlc_am_packed_length(rlc_status_pdu_t* status);
uint32_t rlc_am_packed_length(rlc_amd_retx_t retx);
bool rlc_am_is_valid_status_pdu(const rlc_status_pdu_t& status);
bool rlc_am_is_control_pdu(byte_buffer_t *pdu);
bool rlc_am_is_control_pdu(uint8_t *payload);
bool rlc_am_is_pdu_segment(uint8_t *payload);
std::string rlc_am_status_pdu_to_string(rlc_status_pdu_t *status);
std::string rlc_amd_pdu_header_to_string(const rlc_amd_pdu_header_t &header);
bool rlc_am_is_control_pdu(byte_buffer_t* pdu);
bool rlc_am_is_control_pdu(uint8_t* payload);
bool rlc_am_is_pdu_segment(uint8_t* payload);
std::string rlc_am_status_pdu_to_string(rlc_status_pdu_t* status);
std::string rlc_amd_pdu_header_to_string(const rlc_amd_pdu_header_t& header);
bool rlc_am_start_aligned(const uint8_t fi);
bool rlc_am_end_aligned(const uint8_t fi);
bool rlc_am_is_unaligned(const uint8_t fi);

77
lib/src/upper/pdcp_entity_nr.cc
Unescape Escape View File

@ -25,7 +25,7 @@
namespace srslte {
pdcp_entity_nr::pdcp_entity_nr() {}
pdcp_entity_nr::pdcp_entity_nr() : reordering_fnc(this) {}
pdcp_entity_nr::~pdcp_entity_nr() {}
@ -53,7 +53,7 @@ void pdcp_entity_nr::init(srsue::rlc_interface_pdcp* rlc_,
// Timers
reordering_timer_id = timers->get_unique_id();
reordering_timer = timers->get(reordering_timer_id);
reordering_timer->set(&reordering_fnc, (uint32_t)cfg.t_reordering);
}
// Reestablishment procedure: 38.323 5.2
@ -173,29 +173,24 @@ void pdcp_entity_nr::write_pdu(unique_byte_buffer_t pdu)
if (rcvd_count == rx_deliv) {
// Deliver to upper layers in ascending order of associeted COUNT
log->debug("Delivering SDU(s) to upper layers\n");
for (std::map<uint32_t, unique_byte_buffer_t>::iterator it = reorder_queue.begin();
it != reorder_queue.end() && it->first == rx_deliv;) {
log->debug("Delivering SDU with RCVD_COUNT %d\n", it->first);
// Pass to upper layers
if (is_srb()) {
rrc->write_pdu(lcid, std::move(it->second));
} else {
gw->write_pdu(lcid, std::move(it->second));
}
deliver_all_consecutive_counts();
}
// Remove from queue
reorder_queue.erase(it++);
// Handle reordering timers
if(reordering_timer->is_running() and rx_deliv >= rx_reord){
reordering_timer->stop();
reordering_timer->reset();
}
// Update RX_DELIV
rx_deliv = rx_deliv + 1; // TODO needs to be corrected when queueing is implemented
}
if (not reordering_timer->is_running() and rx_deliv < rx_next) {
rx_reord = rx_next;
reordering_timer->run();
}
// TODO handle reordering timers
}
/*
* Packing / Unpacking Helpers
*/
uint32_t pdcp_entity_nr::read_data_header(const unique_byte_buffer_t& pdu)
{
// Check PDU is long enough to extract header
@ -278,4 +273,46 @@ void pdcp_entity_nr::append_mac(const unique_byte_buffer_t& sdu, uint8_t* mac)
memcpy(&sdu->msg[sdu->N_bytes], mac, 4);
sdu->N_bytes += 4;
}
/*
* Reordering Helpers
*/
// Deliver all consecutivly associated COUNTs.
// Update RX_NEXT after submitting to higher layers
void pdcp_entity_nr::deliver_all_consecutive_counts()
{
for (std::map<uint32_t, unique_byte_buffer_t>::iterator it = reorder_queue.begin();
it != reorder_queue.end() && it->first == rx_deliv;
reorder_queue.erase(it++))
{
log->debug("Delivering SDU with RCVD_COUNT %d\n", it->first);
// Pass PDCP SDU to the next layers
pass_to_upper_layers(std::move(it->second));
// Update RX_DELIV
rx_deliv = rx_deliv + 1; // TODO needs to be corrected when queueing is implemented
}
}
void pdcp_entity_nr::reordering_callback::timer_expired(uint32_t timer_id)
{
parent->log->debug("Reordering timer expired\n");
// Deliver all PDCP SDU(s) with associeted COUNT value(s) < RX_REORD
for (std::map<uint32_t, unique_byte_buffer_t>::iterator it = parent->reorder_queue.begin();
it != parent->reorder_queue.end() && it->first < parent->rx_reord;
parent->reorder_queue.erase(it++)) {
// Deliver to upper layers
parent->pass_to_upper_layers(std::move(it->second));
}
// Deliver all PDCP SDU(s) consecutivly associeted COUNT value(s) starting from RX_REORD
parent->deliver_all_consecutive_counts();
if (parent->rx_deliv < parent->rx_next){
}
return;
}
} // namespace srslte

50
lib/test/upper/pdcp_nr_test.cc
Unescape Escape View File

@ -148,8 +148,12 @@ int test_tx(uint32_t n_packets,
srslte::log* log)
{
srslte::pdcp_entity_nr pdcp;
srslte::pdcp_config_t cfg = {
1, srslte::PDCP_RB_IS_DRB, srslte::SECURITY_DIRECTION_UPLINK, srslte::SECURITY_DIRECTION_DOWNLINK, pdcp_sn_len};
srslte::pdcp_config_t cfg = {1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_UPLINK,
srslte::SECURITY_DIRECTION_DOWNLINK,
pdcp_sn_len,
srslte::pdcp_t_reordering_t::ms500};
rlc_dummy rlc(log);
rrc_dummy rrc(log);
@ -273,10 +277,20 @@ int test_rx_in_sequence(uint64_t n_packets, uint8_t pdcp_sn_len, srslte::byte_bu
{
srslte::pdcp_entity_nr pdcp_tx;
srslte::pdcp_entity_nr pdcp_rx;
srslte::pdcp_config_t cfg_tx = {
1, srslte::PDCP_RB_IS_DRB, srslte::SECURITY_DIRECTION_UPLINK, srslte::SECURITY_DIRECTION_DOWNLINK, pdcp_sn_len};
srslte::pdcp_config_t cfg_rx = {
1, srslte::PDCP_RB_IS_DRB, srslte::SECURITY_DIRECTION_DOWNLINK, srslte::SECURITY_DIRECTION_UPLINK, pdcp_sn_len};
srslte::pdcp_config_t cfg_tx = {1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_UPLINK,
srslte::SECURITY_DIRECTION_DOWNLINK,
pdcp_sn_len,
srslte::pdcp_t_reordering_t::ms500};
srslte::pdcp_config_t cfg_rx = {1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_DOWNLINK,
srslte::SECURITY_DIRECTION_UPLINK,
pdcp_sn_len,
srslte::pdcp_t_reordering_t::ms500};
rlc_dummy rlc_tx(log);
rrc_dummy rrc_tx(log);
@ -334,8 +348,12 @@ int test_rx_in_sequence(uint64_t n_packets, uint8_t pdcp_sn_len, srslte::byte_bu
int test_rx_out_of_order(uint8_t pdcp_sn_len, srslte::byte_buffer_pool* pool, srslte::log* log)
{
srslte::pdcp_entity_nr pdcp_rx;
srslte::pdcp_config_t cfg_rx = {
1, srslte::PDCP_RB_IS_DRB, srslte::SECURITY_DIRECTION_DOWNLINK, srslte::SECURITY_DIRECTION_UPLINK, pdcp_sn_len};
srslte::pdcp_config_t cfg_rx = {1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_DOWNLINK,
srslte::SECURITY_DIRECTION_UPLINK,
pdcp_sn_len,
srslte::pdcp_t_reordering_t::ms500};
rlc_dummy rlc_rx(log);
rrc_dummy rrc_rx(log);
@ -380,8 +398,12 @@ int test_rx_out_of_order(uint8_t pdcp_sn_len, srslte::byte_buffer_pool* pool, sr
int test_rx_out_of_order_timeout(uint8_t pdcp_sn_len, srslte::byte_buffer_pool* pool, srslte::log* log)
{
srslte::pdcp_entity_nr pdcp_rx;
srslte::pdcp_config_t cfg_rx = {
1, srslte::PDCP_RB_IS_DRB, srslte::SECURITY_DIRECTION_DOWNLINK, srslte::SECURITY_DIRECTION_UPLINK, pdcp_sn_len};
srslte::pdcp_config_t cfg_rx = {1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_DOWNLINK,
srslte::SECURITY_DIRECTION_UPLINK,
pdcp_sn_len,
srslte::pdcp_t_reordering_t::ms500};
rlc_dummy rlc_rx(log);
rrc_dummy rrc_rx(log);
@ -406,11 +428,15 @@ int test_rx_out_of_order_timeout(uint8_t pdcp_sn_len, srslte::byte_buffer_pool*
// decript and check matching SDUs (out of order)
pdcp_rx.write_pdu(std::move(rx_pdu7));
gw_rx.get_last_pdu(sdu_act);
// Make sure out of order is not received until time out
TESTASSERT(gw_rx.rx_count == 0);
for (uint16_t i = 0; i < 500; ++i){
timers_rx.step_all();
}
//Trigger timer
TESTASSERT(gw_rx.rx_count == 1);
gw_rx.get_last_pdu(sdu_act);
TESTASSERT(sdu_exp->N_bytes == sdu_act->N_bytes);
for (uint32_t j = 0; j < sdu_act->N_bytes; ++j) {
TESTASSERT(sdu_exp->msg[j] == sdu_act->msg[j]);

59
srsenb/src/stack/rrc/rrc.cc
Unescape Escape View File

@ -218,11 +218,12 @@ void rrc::add_user(uint16_t rnti)
}
if (rnti == SRSLTE_MRNTI) {
srslte::pdcp_config_t cfg_{1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_DOWNLINK,
srslte::SECURITY_DIRECTION_UPLINK,
srslte::PDCP_SN_LEN_12};
srslte::pdcp_config_t cfg = {.bearer_id = 1,
.rb_type = srslte::PDCP_RB_IS_DRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_12,
.t_reorderding = srslte::pdcp_t_reordering_t::ms500};
uint32_t teid_in = 1;
@ -1646,11 +1647,13 @@ void rrc::ue::send_connection_setup(bool is_setup)
parent->rlc->add_bearer(rnti, 1, srslte::rlc_config_t::srb_config(1));
// Configure SRB1 in PDCP
srslte::pdcp_config_t pdcp_cnfg{.bearer_id = 1,
.rb_type = srslte::PDCP_RB_IS_SRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_5};
srslte::pdcp_config_t pdcp_cnfg{.bearer_id = 1,
.rb_type = srslte::PDCP_RB_IS_SRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_5,
.t_reorderding = srslte::pdcp_t_reordering_t::ms500};
parent->pdcp->add_bearer(rnti, 1, pdcp_cnfg);
// Configure PHY layer
@ -1865,11 +1868,13 @@ void rrc::ue::send_connection_reconf(srslte::unique_byte_buffer_t pdu)
parent->rlc->add_bearer(rnti, 2, srslte::rlc_config_t::srb_config(2));
// Configure SRB2 in PDCP
srslte::pdcp_config_t pdcp_cnfg_srb = {.bearer_id = 2,
.rb_type = srslte::PDCP_RB_IS_SRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_5};
srslte::pdcp_config_t pdcp_cnfg_srb = {.bearer_id = 2,
.rb_type = srslte::PDCP_RB_IS_SRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_5,
.t_reorderding = srslte::pdcp_t_reordering_t::ms500};
parent->pdcp->add_bearer(rnti, 2, pdcp_cnfg_srb);
parent->pdcp->config_security(rnti, 2, k_rrc_enc, k_rrc_int, k_up_enc, cipher_algo, integ_algo);
parent->pdcp->enable_integrity(rnti, 2);
@ -1879,11 +1884,13 @@ void rrc::ue::send_connection_reconf(srslte::unique_byte_buffer_t pdu)
parent->rlc->add_bearer(rnti, 3, srslte::make_rlc_config_t(conn_reconf->rr_cfg_ded.drb_to_add_mod_list[0].rlc_cfg));
// Configure DRB1 in PDCP
srslte::pdcp_config_t pdcp_cnfg_drb = {.bearer_id = 1,
.rb_type = srslte::PDCP_RB_IS_DRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_12};
srslte::pdcp_config_t pdcp_cnfg_drb = {.bearer_id = 1,
.rb_type = srslte::PDCP_RB_IS_DRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_12,
.t_reorderding = srslte::pdcp_t_reordering_t::ms500};
if (conn_reconf->rr_cfg_ded.drb_to_add_mod_list[0].pdcp_cfg.rlc_um_present) {
if (conn_reconf->rr_cfg_ded.drb_to_add_mod_list[0].pdcp_cfg.rlc_um.pdcp_sn_size.value ==
pdcp_cfg_s::rlc_um_s_::pdcp_sn_size_e_::len7bits) {
@ -1952,11 +1959,13 @@ void rrc::ue::send_connection_reconf_new_bearer(LIBLTE_S1AP_E_RABTOBESETUPLISTBE
// Configure DRB in PDCP
srslte::pdcp_config_t pdcp_config = {
.bearer_id = (uint8_t)(drb_item.drb_id - 1), // TODO: Review all ID mapping LCID DRB ERAB EPSBID Mapping
.rb_type = srslte::PDCP_RB_IS_DRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_12};
.bearer_id = (uint8_t)(drb_item.drb_id - 1), // TODO: Review all ID mapping LCID DRB ERAB EPSBID Mapping
.rb_type = srslte::PDCP_RB_IS_DRB,
.tx_direction = srslte::SECURITY_DIRECTION_DOWNLINK,
.rx_direction = srslte::SECURITY_DIRECTION_UPLINK,
.sn_len = srslte::PDCP_SN_LEN_12,
.t_reorderding = srslte::pdcp_t_reordering_t::ms500};
parent->pdcp->add_bearer(rnti, lcid, pdcp_config);
// DRB has already been configured in GTPU through bearer setup

8
srsue/src/stack/rrc/rrc.cc
Unescape Escape View File

@ -2684,7 +2684,9 @@ void rrc::add_srb(srb_to_add_mod_s* srb_cnfg)
.rb_type = PDCP_RB_IS_SRB,
.tx_direction = SECURITY_DIRECTION_UPLINK,
.rx_direction = SECURITY_DIRECTION_DOWNLINK,
.sn_len = PDCP_SN_LEN_5};
.sn_len = PDCP_SN_LEN_5,
.t_reordering = pdcp_t_reordering_t::ms500};
pdcp->add_bearer(srb_cnfg->srb_id, pdcp_cfg);
if (RB_ID_SRB2 == srb_cnfg->srb_id) {
pdcp->config_security(srb_cnfg->srb_id, k_rrc_enc, k_rrc_int, k_up_enc, cipher_algo, integ_algo);
@ -2761,7 +2763,9 @@ void rrc::add_drb(drb_to_add_mod_s* drb_cnfg)
.rb_type = PDCP_RB_IS_DRB,
.tx_direction = SECURITY_DIRECTION_UPLINK,
.rx_direction = SECURITY_DIRECTION_DOWNLINK,
.sn_len = PDCP_SN_LEN_12};
.sn_len = PDCP_SN_LEN_12,
.t_reordering = pdcp_t_reordering_t::ms500};
if (drb_cnfg->pdcp_cfg.rlc_um_present) {
if (drb_cnfg->pdcp_cfg.rlc_um.pdcp_sn_size == pdcp_cfg_s::rlc_um_s_::pdcp_sn_size_e_::len7bits) {
pdcp_cfg.sn_len = 7;

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